fix: Ensure the cleanup function from init() really rolls back everything

[webJose]

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[Copilot]

Pull Request Overview

This PR ensures the cleanup function returned by init() properly resets all library state to its default uninitialized values, enabling proper cleanup and multiple initialization cycles.

• Adds reset functions for routing options, logger, and trace options
• Updates the cleanup function to call all reset functions
• Changes the default logger from console to offLogger for proper uninitialized state
• Adds comprehensive tests to verify complete rollback functionality

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/lib/index.ts	Updates cleanup function to call new reset functions and imports them
src/lib/index.test.ts	Adds comprehensive tests for initialization and cleanup behavior
src/lib/core/trace.test.ts	Adds tests for the new resetTraceOptions function
src/lib/core/trace.svelte.ts	Implements resetTraceOptions function with default values
src/lib/core/options.ts	Implements resetRoutingOptions function with default values
src/lib/core/options.test.ts	Adds tests for the new resetRoutingOptions function
src/lib/core/Logger.ts	Changes default logger to offLogger and implements resetLogger function
src/lib/core/Logger.test.ts	Updates tests for new default logger and adds resetLogger tests

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